Sounds like you got some spark plug wires crossed...but i'm no mechanic. Its easy enough to do, and will cause it to run VERY rough.
plugs are ngk, new, gap is set to the specs went back thur made sure all the wires to the plugs were in the right order.
when you check the firing order be sure you are going in the right direction on the distributor cap!!! its an honest mistake that i have seen many times.... what is the firing order on that motor?miles on the motor..... dont really know, it is bout 9 years old, was new when I got the truck,
cable to the speedo broke, I never fixed it. guessing bout 75k or so.
did this am, ajusted the valves, one of the intakes was a bit tight.
checked all ignition peices, used the factory book and went thur the coil/ignitor/ distributor, all checks ok within specs.
went to recheck timing after doing the above found that the cpu is now showing the airflow meter as a problem. have checked the resistance per the book. it shows ok. have run out of time this evening to do the other test on the meter.
other than the cpu code, this thing feels like a vacum leak, but I cant find it to save my life, maybe the airflow meter is giving bad info to the cpu and messing up the works...
plan to change out the fuel filter in the next day or so....who ever put the thing up under the intake should be hung...... only way to get to it is to remove the tire and go at it that way, most of the time i have to get one of my kids to reach in to help....
thanks to all that have added their imput, it has helped.:smile2: